Grunge is a great choice for guys. I don't care for novelty fabrics; I prefer to let the design of the quilt do the talking. If I'd made a quilt for my preteen boys based on their interests, I would have been making a new quilt for them every 6 months or so. Grunge is perfect because it comes in so many colors, it's not flat, and it doesn't have vines, flowers, paisley, or anything else that seems girly.